The USA website called Expert Flyer.One has to be careful:...

The USA website called Expert Flyer.

One has to be careful: searching a few hours before a flight is scheduled to depart apparently results in poor results, as not everyone has checked in, so the 'X' that means 'blocked seat' may mean that a particular allocated seat number is reserved for mbro because he's a 'platinum' frequent flyer. (Of course, it can also mean that a seat is to be kept vacant to give the traveller more comfort, but we've no way of knowing the reason).

Checking a flight after it's departed tends to give an accurate reading of the number on board. I confirmed this earlier this week with a friend who was on a flight: the 'EF' data matched what he was told by a hostess.

For some reason given I don't subscribe, airlines like QAN don't allow the business class numbers travelling to be displayed, which is why the figures above only refer to slum class.